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The Y-DNA pages provide a description of how people with the Coogan surname may be linked using a test on the Y-Chromosome. This test can reveal a connection between males and even provide a clue to the number of generations to the Most Recent Common Ancestor (MRCA). Some results are posted. Use the data on the CRG pages as a reference to assist you in your further research.
If you are a male Coogan descendant who has already completed a Y-DNA sequence, contact us to add your results to this page.
What is Y-DNA?
The Y-Chromosome test effectively traces the MALE line only. If a man takes this test then it would trace through the males in his ancestry. If a match was found with another male who had been tested then that male is descended from the same male lineage. You cannot tell exactly WHERE the linkage is between the two male researchers, only that they have a common male ancestor SOMEWHERE on their trees back in time. Important: This test is different than the The mtDNA (mitochondrial) test, which is for tracking DNA that is passed only through the FEMALE line and cannot be passed on through the male line.
NOTE - Persons with 12 matches and the same surname have a 99% likelihood of sharing a common ancestor.
Genealogy DNA Testing Sites|
Visit the sites below to learn more about the different types of DNA tests available - and how you can discover your genetic heritage!
DNA Testing by Ancestry.com
The Genographic Project
|Y-DNA DYS Markers|
|Three levels of testing have used to determine the relationships between the Coogan families on this site: Y-DNA-12, Y-DNA-25 and Y-DNA-37. At each locus within the "short tandem repeat" of a Y-DNA sequence, different values for each DNA Y-chromosome Segment (DYS) are determined from the Y-DNA sample. The results for each level of testing are presented below on the right side, while probabilities of relationship between people who share the same alleles (at 12, 25 and 37 markers) are presented below on the left. To determine the relative closeness between individuals who do not share all of the markers, visit this page.|
According to a mutation rate study presented during the 1st International Conference on Genetic Genealogy (2004), the probability that two people who match the first 12 alleles to the right share a common ancestor within
04 generations is 33.57%
08 generations is 55.88%
12 generations is 70.69%
16 generations is 80.53%
20 generations is 87.07%
24 generations is 91.41%
According to a mutation rate study presented during the 1st International Conference on Genetic Genealogy (2004), the probability that two people who match the first 25 alleles to the right share a common ancestor within
04 generations is 61.17%
08 generations is 84.92%
12 generations is 94.15%
16 generations is 97.73%
20 generations is 99.12%
24 generations is 99.66%
According to a mutation rate study presented during the 1st International Conference on Genetic Genealogy (2004), the probability that two people who match the first 37 alleles to the right share a common ancestor within
04 generations is 83.49%
08 generations is 97.28%
12 generations is 99.55%
16 generations is 99.93%
20 generations is 99.99%
24 generations is 100.0%
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